Fluctuation of alpha-fetoprotein 80 after undergoing liver cancer surgery, there may be the possibility of liver cancer recurrence or metastasis. Alpha-fetoprotein is a tumor marker specific for liver cancer, and the normal value of alpha-fetoprotein after liver cancer surgery is between 0 and 40 μg/L. If the alpha-fetoprotein fluctuates above and below 80 after liver cancer surgery, it means that the value of alpha-fetoprotein is gradually increasing, and also fluctuates between 80 repeatedly, then the possibility of liver cancer recurrence and metastasis will be increased. If the range of alpha-fetoprotein is elevated, further examination should be carried out under the guidance of doctor, such as ultrasound, CT and magnetic resonance imaging examination. If early tumor recurrence or metastasis is found through review, relevant treatments, such as chemotherapy and immunotherapy, should be carried out in time with the help of doctors to effectively prevent tumor recurrence or metastasis.